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(NoModeL) E. T. THOMAS.

. Sewing Machine. v

No. 240,932. Patented May 3,1881,

HEP-9. 4

N PETERS, PKOTO-LITHOGRAPHER WASHINGTON. D. C,

- lJNrTE STATES PATENT Tries.

EDDY T. THOMAS, OF NEW YORK, N. Y., ASSIGNOR TO THE GOLD MEDAL SEIVING MACHINE COMPANY, OF ORANGE, MASS.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 240,932, dated May 3, 1881.

- Application filed November 10,1880. (No model.)

To all whom it may concern:

Be it known that I, EDDY.T. THOMAS, of New York city, New York county, and State ofNew York, have invented an Improvementin Sewing-Machines, of which the following description, in connection with the accompanying drawings, is a specification.

This invention in sewing-machines relates to mechanism for actuating the shuttle-carrier and feed-bar, whereby I am enabled to greatly simplify a lock-stitch sewi n g-machine employing a shuttle. V

In this my invention the needle-bar will be moved from a cam on a rotating shaft in the I 5 overhanging arm, as now practiced in the Home, or any other well-known sewing-machine, and the said rotating shaft will have fixed upon it an eccentric to actuate a link connected with a bell-crank lever, as in my ap- 2o plication,No. 20,837, for United States patent, filed November 19, 1880, to which reference may be had. This bell-crank lever has joined with it a guided and toothed connecting-rod, which engages a pinion on and oscillates a rock-shaft, with which the shuttle-carrier is attached. The said connecting-rod, by means of a slotted connection, rocks a feed-operatin g cam about its axis and moves the feed-bar forward at the proper times, and a cam formed 0 on the top of the connecting-rod lifts the feedbar and permits it to descend at the proper times.

Figure 1 represents, in section and side elevation, sufficient of a sewing-machine to indi- 3 5 cate my present invention, the upper portion of the sewing-machine (not represented) being supposed to be well known, or, as represented in my application above referred to. Fig. 2 is an enlarged section of Fig.1 on the dotted line a: on. Fig. 3 is a detail,showing the forward end of the toothed connecting-rod for moving the shuttle and feed, the feed-bar being shown as lowered and resting thereon. Figs. 4 to 7, inclusive, represent, in detail, the feed-operatin g 5 cam and toothed connecting-rod and feed-bar in different positions; and Fig. 8 the feed-operating cam in top view; and Fig. 9, a view of the upper end of link a and the eccentric a on the shaft a', as in my application referred to.

a The frame-work a of the machine is, or it may be, of any suitable and usual construction. In the overhanging arm (broken off and not shown, to save room upon the drawings) there will be placed a rotating needle-bar-opcrating shaft to, such as shown in my application No. 20,837, referred to, tiled November 19, 1880, through which an eccentric, a (see detail, Fig. 9,) will reciprocate the link a joined,

as described, with the bell-crank lever a", the latter having jointed to it atits other end the connecting-rod a", all as in the said application, except that the connecting-rod herein shown has its forward end provided with aseries of rack-teeth, 10, which engage with a pinion, k, on or forming part of a rock-shaft, b, mounted loosely on the hearing a so that as the said connecting-rod is reciprocated the said rock-shaftis turned, and the shuttle-carrier and its shuttle, of usual construction, (not shown,) vibrated to enter and pass through the loop of needle-thread projected from the usual eyepointed needle. This connecting-rod is slotted at 12 to fit over a stationary pin, 13, which acts to keep the teeth of the said rod in engagement with the teeth of the gear 70, as in Fig. 3. The upper side of this connecting-r'odis provided with a feed-bar-liftin g cam, composed of an incline, 14, to lift the feed-bar h, and a surface, 15,to keep it raised for the proper length of time. At the rear side of this connecting- 8o rod (see Figs. 2 and 4 to 7) is attached a slotted ear, to engage a pin, m connected with one side of the feed-bar-operati n g cam d, which, with its incline3, its stud d, and feed-adjusting screw d and feed-bar h with leg 2, are all as in my application No. 20,837 for United States patent, tiled on the 19th day of November, 1880, to which reference may be had, the incline 3 acting on the leg 2 of the said feed-bar as the cam d is rocked to move the feed-bar o forward afterit has been lifted against the fabric by the lifting-cam on the connecting-rod, a spring, h pushing the feed-bar backward and down at the proper time. Forward movement of the screw d changes the position of the cam 9 5 d and alters the length of the feed-stroke.

A sewing-machine having its shuttle-carrier and feed actuated as herein described may be made cheaply, and will be very simple as to its mechanical parts, and will run easily and rap- 10o idly.

I am aware thatit is not new to move a shuttle-carrier from a rack and pinion; but I am not aware that the same toothed connectingrod for operating the shuttle-carrier has ever been used to also lift the feedbar and turn its forward-moving cam.

The slot-and-pin connection between the connecting-rod a and the cam (1 permits the cam for lifting the feed-bar to act in advance of the forward-moving incline 3, so as to elevate the serrated part of the feed-bar against the fabric before the feed-bar is moved forward.

I claim- In a sewing-machine, the shuttle'carrier fixed upon the shaft I), placed loosely in its bearings the pinion secured to the said shaft, the toothed connecting-rod provided with the feedbar-lifting cam, and in engagement with the EDDY T. THOBIAS.

Witnesses:

SPENCER O. DOTY, BERNARD J. KELLY. 

